Wireless Power Transfer

JMAG makes it possible to carry out investigations ranging from basic RLC analyses to efficiencypredictions. To determine the efficiency of a wireless power transfer design, you must analyze the power transfer as a function of position and angle. This can be done quickly in JMAG using the parametric analysis tool. This tool will not only predict optimal positioning, but it will also help develop a robust and reliable design.

Evaluation Items

Self-inductance, mutual inductance, induction voltage, load current, power, copper loss, iron loss, transmission efficiency, temperature distribution

Case Studies

Power Transmission Efficiency

In the electromagnetic induction-type wireless power supply, magnetic flux linking to the upper power-receiving side reduces due to positional misalignment. A decrease in flux linkage causes a reduction in the mutual inductance between coils. From this the resonant frequency determined by the inductance and the capacitor is shifted, and transmission efficiency decreases. Also, when the voltage of the power-receiving side coil is constant, the input voltage on the power supply side changes, and the supply power itself reduces.


Reference

No Title
AN-199 Application Catalog, "199 - Efficiency Analysis of Wireless Power Transfer via Electromagnetic Induction Method using Resonance Circuits"
AN-196 Application Catalog, "196 - Analysis of coil stray capacitance"
AN-190 Application Catalog, "190 - Arrangement Optimization of Wireless Power Supply System"
AN-139 Application Catalog, "139 - Power Transmission Analysis Using Magnetic Resonance Phenomena"
AN-113 Application Catalog, "113 - Power Transmission Analysis of a Wireless Power Transfer System with Opposing Cores"
AN-086 Application Catalog, "86 - Power Transmission Analysis of a Wireless Power Transfer System"